I am looking for information on my Grandfather Callahan. He was born Dec 1893 in Cambridge, Mass to James and Julia O'Callaghan. While the family used various forms of Callahan or O'Callaghan, when he married my grandmother he settled on Callahan. His name was James O'Callaghan on his birth registry but I only heard him referred to as Darby by everyone in the family. According to the 1900-1910 censuses the family lived on Seventh St in Cambridge, Ma. He had 3 sisters and 1 brother - Francis who was supposedly very good at baseball. My sister says Grandma told he was signed to the Boston Pro league but died in an epidemic before his first game. (Not the Red Sox but whpever there was before them-sometime bet 1910 and 1920.